Source Counts Spanning Eight Decades Of Flux Density At 1.4 Ghz

Brightness-weighted differential source counts S(2)n(S) spanning the eight decades of flux density between 0.25 mu Jy and 25 Jy at 1.4 GHz were measured from (1) the confusion brightness distribution in the MeerKAT DEEP2 image below 10 mu Jy, (2) counts of DEEP2 sources between 10 mu Jy and 2.5 mJy, and (3) counts of NVSS sources stronger than 2.5 mJy. We present our DEEP2 catalog of 1.7 x 10(4) discrete sources complete above S = 10 mu Jy over omega = 1.04 deg(2). The brightness-weighted counts converge as S(2)n(S) proportional to S-1/2 below S = 10 mu Jy, so >99% of the Delta T-b similar to 0.06 K sky brightness produced by active galactic nuclei and 96% of the Delta T-b similar to 0.04 K added by star-forming galaxies has been resolved into sources with S >= 0.25 mu Jy. The Delta T-b 0.4 K excess brightness measured by ARCADE 2 cannot be produced by faint sources smaller than 50 kpc if they cluster like galaxies.